Costa Rica has several international airports. Most visitors fly into San José, the capital, or Liberia. Upon arrival, you will need to present your passport at the immigration kiosk, where you will receive a tourist visa; proof of exit in the form of a return or onward ticket is required. Costa Rica's official language is Spanish, and the currency is the colón. Credit cards are widely accepted. Note that there is a sales tax of 13%. When you leave the country, you will be required to pay a U.S. $29 departure tax; a few airlines will include the fee in their ticket prices so always double check. Voltage and plugs are the same as in the United States.